/*!
 *****************************************************************************
 * @file:    CN0391.h
 * @brief:
 * @version: $Revision$
 * @date:    $Date$
 *-----------------------------------------------------------------------------
 *
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    which differ from those listed here.
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 *
 *****************************************************************************/

#ifndef _CN0391_H_
#define _CN0391_H_
#include "AD7124.h"

class CN0391
{
private:
public:
	CN0391();

	typedef enum
	{
		CHANNEL_P1 = 0,
		CHANNEL_P2,
		CHANNEL_P3,
		CHANNEL_P4
	}channel_t;

   typedef enum
   {
      ERR_UNDER_RANGE = 1,
      ERR_OVER_RANGE,
      NO_ERR

   }error_code;


	int32_t read_channel(int ch);

	float data_to_voltage(int32_t data, uint8_t channel);
	float data_to_resistance(int32_t data);

	void calc_rtd_temperature(channel_t ch, float *temp);
	void calc_th_temperature(channel_t ch, float cjTemp, float *buffer);

	void enable_channel(int channel);
	void disable_channel(int channel);
	void enable_current_source(int current_source_channel);
	void start_single_conversion();

	void reset();
	void setup();
	void init();

   void calibration(uint8_t channel);
   void read_reg(void);
   void set_calibration_mode(uint16_t mode);
   void set_power_mode(int mode);

	void set_data(void);
	void display_data(void);

	AD7124 ADC;


};

#define YES    1
#define NO     0


#define R5      1600.0  //ohmi
#define I_EXT   0.75    //mA

#define VREF_EXT    (R5*I_EXT)  //mV
#define VREF_INT     2500.0     //mV

#define _2_23     8388608.0

#define RTD_CHANNEL    0

#define TH_CHANNEL     1

#define GAIN_RTD       1  //GAIN1
#define GAIN_TH        32  //GAIN32


#define POLY_CALC(retVal, inVal, coeff_array) \
{ \
    float expVal = 1.0f; \
    const float* coeff = coeff_array; \
    retVal = 0.0f; \
    while(*coeff != 1.0f)\
    { \
        retVal += *coeff * expVal; \
        expVal *= inVal; \
        coeff++; \
    }\
}


#define USE_RTD_CALIBRATION  YES  // Set YES to enable calibration on RTD channel, otherwise set to NO
#define USE_TH_CALIBRATION   YES   // Set YES to enable calibration on TC channel, otherwise set to NO

#define DISPLAY_REFRESH     (1000)   //ms

#define TC_OFFSET_VOLTAGE    0.00    // mV compensation for system offset


#endif
